（C ++/MFC）如何在Epson打印机上打印图像？

Question

I已连接到一个项目，该项目的目标是通过USB或RS232进行编程使用热打印机进行接收输出。我需要使用ESCPOS命令打印收据。 pirnt收据结果→

输入图像描述在这里 我想要recipt→输入图像描述在这里

qr iamage在这里→

输入图像说明此处 此QR图像是位图

{   
  CString csFileName = fileName;
  csFileName = csFileName.MakeUpper();

// 1. BMP image load 
HBITMAP hBmp = (HBITMAP)::LoadImage(NULL, fileName, IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE | LR_MONOCHROME);
if (hBmp == NULL) return ERR_PRT_WRITE;

if (hBmp == NULL)
return ERR_PRT_WRITE;
CBitmap* pBmp = CBitmap::FromHandle(hBmp);
BITMAP bmpInfo;
memset(&bmpInfo, 0, sizeof(bmpInfo));
pBmp->GetBitmap(&bmpInfo);

if (bmpInfo.bmBitsPixel != 1)
{
    pBmp->DeleteObject();
    return ERR_PRT_WRITE;
}

int pixelWidth = bmpInfo.bmWidth;
int height = bmpInfo.bmHeight;
int widthBytes = (pixelWidth + 7) / 8;
int paddedRowBytes = bmpInfo.bmWidthBytes;
int totalPaddedBytes = paddedRowBytes * height;

BYTE* paddedData = new BYTE[totalPaddedBytes];
if (pBmp->GetBitmapBits(totalPaddedBytes, paddedData) != totalPaddedBytes)
{
    delete [] paddedData;
    return ERR_PRT_WRITE;
}


BYTE* rasterData = new BYTE[widthBytes * height];
for (int row = 0; row < height; row++) 
{
    BYTE* src = paddedData + ((height - 1 - row) * paddedRowBytes);
    BYTE* dst = rasterData + (row * widthBytes);
    memcpy(dst, src, widthBytes);
}
delete [] paddedData;

const char initPrinter[] = "\x1B\x40";   // ESC @
_printer.write((LPSTR)initPrinter, strlen(initPrinter));


const char pageModeOn[] = "\x1B\x4C";      // ESC L
_printer.write((LPSTR)pageModeOn, strlen(pageModeOn));


const char setPageArea[] = {
    0x1B, 0x57,       // ESC W
    0x00, 0x00,      
    0x00, 0x00,      
    0x80, 0x01,      
    0x37, 0x02       
};
_printer.write((LPSTR)setPageArea, sizeof(setPageArea));

const char setAbsPosImage[] = { 0x1B, 0x24, 0x00, 0x00 };  // ESC $
_printer.write((LPSTR)setAbsPosImage, sizeof(setAbsPosImage));


BYTE m = 0x01; 
for (int row = 0; row < height; row++) {
    BYTE* rowData = rasterData + (row * widthBytes);
    BYTE nL = (BYTE)(widthBytes & 0xFF);
    BYTE nH = (BYTE)((widthBytes >> 8) & 0xFF);

    BYTE escStar[5] = {0x1B, 0x2A, m, nL, nH};
    _printer.write((LPSTR)escStar, 5);  
    _printer.write((LPSTR)rowData, widthBytes); 
}

delete [] rasterData;

const char setAbsPosText[] = { 0x1B, 0x24, 0xC8, 0x00 };  
_printer.write((LPSTR)setAbsPosText, sizeof(setAbsPosText));




char textData[1024];
memset(textData, 0x00, sizeof(textData));
sprintf_s(textData, sizeof(textData), "%s", "Hi hello");
_printer.write(textData, strlen(textData));


_printer.write((LPSTR) "\x1B\x0C", 2);  // ESC FF

pBmp->DeleteObject();

return TRUE;
}

Answer 1

for (int row = 0; row < height; row+=8) {
  for (int col=0;col<width; col++) {
   //make a array to store the row information here
   BYTE c=0;
   for (int i=0;i<8;i++)
     if (IsBitmapPixelBlack(col,row+i)) c|=(1<<i);
   //Append c to the array
  }
  //Print out this row (i.e. these 8 pixels vertically for the the entire width)
}

我建议您首先仅获取QR码，然后修理计划，以包括QR码右侧的文本（您需要在第一行之后和第二行之前打印）。 希望这给您一些指导 - 这些东西是非常古老的学校，并且您使用的ESCPOS协议已有1980年底以来已经存在